Manganosite

Manganosit, chemical manganese (II ) oxide, is a rarely occurring mineral from the mineral class of oxides and hydroxides with a ratio of metal to oxygen of 1:1 with only small to medium-sized cations. It belongs to the periclase group.

Manganosit crystallize in the cubic crystal system with the chemical formula of MnO and forms octahedral crystals which occur up to 10 cm in size and grains fissile units. It is in fresh fracture of emerald green color, turns on the air but quickly black.

Etymology and history

The mineral was in 1817 by C. F. Jasche in the type locality, the Emperor Franz- mine near Elbingerode found in the resin. It was the element manganese named after his part.

Classification

In the classification by Strunz Manganosit is counted among the oxides with a ratio of metal to oxygen of 2:1 or 1:1. After the 8th edition forms a group together with calcium oxide, Monteponit, bunsenite, Murdochit, periclase and wustite. In the 9th edition it forms with the same minerals except the Murdochit a subset of the oxides with a ratio of metal to oxygen of 1:1 and small to medium-sized cations ( Periklasgruppe ).

In the classification by Dana it forms with calcium oxide, Monteponit, bunsenite, periclase, wustite and Hongquiit the Periklasgruppe, a subgroup of the simple oxides with a cation charge of 2 .

Education and Locations

Manganosit forms as a weathering product of other manganese minerals such as rhodochrosite. The formation occurs through metamorphosis under low-oxygen conditions.

Most Manganosit - finds are known from the Japanese island of Honshu. There, the amounts found are also sufficient for economic extraction of manganese ore. Other finds are known inter alia from Sweden, Germany, China, Switzerland, the United Kingdom and the United States.

Crystal structure

Manganosit crystallizes in the cubic crystal system with the space group with the lattice parameters a = 4.44 Å and four formula units per unit cell. It crystallized so that in the sodium chloride structure.

Use

Larger Manganosit deposits serve as raw material for the extraction of manganese.